
To access and maintain the electrical system in your vehicle, first locate the main power distribution unit. This is typically found under the dashboard or near the driver’s side, accessible through a panel. Inside, you’ll find several components that control the vehicle’s electrical functions, such as lights, climate control, and infotainment systems.
Understanding how each component is wired and the connections between the relays and circuits is crucial for diagnosing problems. If a specific feature of the vehicle stops working, such as the power windows or headlights, checking the connections inside the power unit will often lead you to the culprit.
When inspecting the system, ensure that the fuses are properly seated and not damaged. If necessary, use a test light or a multimeter to verify continuity through the fuses. This will help identify any blown connections or malfunctions quickly. Always replace blown fuses with the correct amperage rating to avoid damage to other electrical components.
2017 Q50 Electrical System Layout and Power Distribution Overview

The main power distribution unit in this model is located in the driver’s side cabin, typically beneath the dashboard or behind a panel near the footwell. It is responsible for controlling various electrical components such as lights, climate control, and internal systems.
Each individual relay and connector within the unit is assigned a specific function, ensuring that electrical power is properly routed to components as needed. For example, the windshield wipers, headlights, and air conditioning system all have separate relay points, which helps isolate electrical failures for easier troubleshooting.
It’s important to regularly inspect the connections and ensure no signs of wear, corrosion, or overheating. A malfunctioning electrical component might be due to a faulty connector, rather than a failure within the power distribution unit itself.
If a component stops working, begin by checking the corresponding circuit within the power panel. Look for any blown connections or signs of electrical shorts. It’s a good idea to have a multimeter on hand to confirm whether the circuit is receiving proper voltage.
In the case of a blown relay, it’s recommended to replace it with one that matches the amperage and voltage specifications listed in the vehicle manual. Incorrect replacements could cause further electrical issues or even short-circuit other connected systems.
Finally, when working with the electrical system, always ensure that the battery is disconnected to avoid accidental short-circuits or electric shocks. Regular maintenance checks can help keep the system functioning smoothly and prevent costly repairs in the future.
Identifying the Location of the Main Power Distribution Panel

The primary electrical panel in this model is located inside the vehicle, typically on the driver’s side, near the footwell area. To access it, you will need to remove the panel beneath the dashboard, which is secured by screws or clips depending on the specific trim level.
In most cases, the panel is positioned to the left of the steering wheel, just under the dashboard. This is a convenient location for the driver, allowing easy access for fuse checks or replacements without the need to open the hood. Some vehicles may also have an additional smaller fuse panel near the engine compartment, but the main one will always be inside the cabin.
If you’re unsure of its location, refer to the vehicle’s owner manual for more precise instructions. The manual typically includes a detailed diagram and step-by-step guide for accessing and identifying the different circuits within the power distribution panel.